You could be right and I was certainly not trying to be negative about signing Jolie, but in the past on these types of stocks, I have seen small jumps when signings happen and much bigger ones when production starts. But every one is different. Of course, most of those that I watched or was part of were much higher in starting pps value than we are here and even a 'small' jump for this stock could be huge... It will be interesting to see what happens as things start to develop and the real casting begins...
BTW, I also heard that as far as Jolie goes, this apparently HAS been signed. She is being attributed as being "In the cast" but they are not stating which role yet... See link: http://www.imdb.com/name/nm0001401/ The Gucci project is listed as "untitled", but is in her bio... All IMHO and GTLA...